--- title: "ETF Cost Comparison Tool" description: "ETF cost comparison measures the all-in cost of two ETFs by expense ratio, tracking difference, bid-ask spread, then calculates the breakeven holding period." canonical: https://www.getswoopr.com/etf-investing/etf-cost-comparison-tool/ source: "Swoopr Investment: https://www.getswoopr.com" --- ## Direct Answer > An ETF cost comparison weighs the expense ratio, tracking difference, and bid-ask spread of two funds to find the true all-in cost of ownership, not just the sticker-price expense ratio. A fund with a lower expense ratio can still cost more overall if its tracking difference or spread is wide, so the breakeven holding period shows how long you'd need to hold before the cheaper long-run fund overcomes a wider spread. Use the calculator below to compare two ETFs across all three cost components. # ETF Cost Comparison Tool Enter two ETFs' expense ratios, tracking differences, and bid-ask spreads. Set your holding period. The tool calculates the all-in cost for each fund, identifies which is cheaper for your horizon, and shows the breakeven holding period at which the cheaper long-run fund overcomes a wider spread. ![Stack of Polish zloty banknotes on financial documents with a pen, indicating monetary transactions in an office setting.](https://www.getswoopr.com/images/hero/etf-investing-etf-cost-comparison-tool.webp) *Photo by [Jakub Zerdzicki](https://www.pexels.com/@jakubzerdzicki/) via [Pexels](https://www.pexels.com/photo/polish-currency-and-financial-documents-flat-lay-35230315/)* ## Compare Two ETFs Tracking difference = ETF annual return minus benchmark return (negative = ETF lags index). Use the fund's annual report or ETF.com for these values. Leave tracking difference blank to use expense ratio as the cost proxy. ### ETF A Fund name or ticker Expense ratio (%) Tracking difference (%) (optional) Bid-ask spread (bps) ### ETF B Fund name or ticker Expense ratio (%) Tracking difference (%) (optional) Bid-ask spread (bps) Holding period (years) Investment amount ($) Calculate Total Cost ### Results ETF A ETF B ## How the Calculation Works ### All-In Cost Components - **Annual carry cost:** If tracking difference is provided. It is used as the annual cost (it captures expense ratio, securities lending revenue, and index friction in one number). If not provided, the expense ratio is used. A negative tracking difference (ETF return minus benchmark return) means the ETF lagged its index after all costs, and a positive one means it outperformed. - **Transaction cost:** The bid-ask spread (in basis points) paid as a round-trip cost when buying and selling. One basis point = 0.01%. A 2 bp spread costs 0.02% per round trip (half on entry, half on exit). This cost is incurred once, not annually. - **Total cost over holding period:** (Transaction cost) + (Annual carry cost × Years). Expressed both as a percentage of the investment and in dollar terms. ### Breakeven Holding Period The breakeven holding period is where the cumulative annual cost advantage of the cheaper fund overcomes its wider initial transaction cost. If ETF A has a 2 bp spread but 0.05% lower annual carry cost, and ETF B has a 1 bp spread but 0.05% higher annual cost: ETF A incurs 1 bp more transaction cost upfront, but saves 5 bps annually. Breakeven = 1 bp ÷ 5 bps/year = 0.2 years ≈ 2.4 months. Limitation This tool uses static inputs. Real tracking difference varies year to year. Transaction costs depend on actual executed spread (not mid-point) and market conditions at the time of trade. This calculation assumes one purchase and one sale at exactly the stated spread. Frequent rebalancing traders should multiply the transaction cost by number of round trips per year. ## Related Tools - [Investment Fee Drag Calculator](https://www.getswoopr.com/tools/fee-drag-calculator/): turns an expense-ratio difference like the one compared here into a long-term dollar cost, including the extra effect of lost compounding. - [Portfolio X-Ray](https://www.getswoopr.com/tools/portfolio-x-ray/): estimates a portfolio-wide weighted expense ratio across your whole portfolio, not just two funds. ## References - [SEC Investor.gov: Mutual Funds and Exchange-Traded Funds](https://www.investor.gov/introduction-investing/investing-basics/investment-products/mutual-funds-and-exchange-traded-funds-etfs/mutual-funds) - [CFA Institute Research and Policy Center](https://rpc.cfainstitute.org/) ## Related Reading - [ETF Investing & Fund Analysis](https://www.getswoopr.com/etf-investing/) the section this guide belongs to - [Bond ETF Mechanics](https://www.getswoopr.com/etf-investing/bond-etf-mechanics/) a companion guide in this cluster - [ETF Concentration Risk: How to Measure It](https://www.getswoopr.com/etf-investing/etf-concentration-risk/) a companion guide in this cluster - [ETF Due Diligence Framework](https://www.getswoopr.com/etf-investing/etf-due-diligence-framework/) a companion guide in this cluster - [ETF Overlap Analyzer: Weighted Overlap Across Two to Five Funds](https://www.getswoopr.com/etf-investing/etf-overlap-analyzer/) a companion guide in this cluster - [Expense Ratios and Total Cost of ETF Ownership](https://www.getswoopr.com/etf-investing/expense-ratios-and-total-cost-of-etf-ownership/) a companion guide in this cluster - [Factor and Smart-Beta ETFs](https://www.getswoopr.com/etf-investing/factor-and-smart-beta-etfs/) a companion guide in this cluster - [How ETFs Work: Creation, Redemption, and Arbitrage](https://www.getswoopr.com/etf-investing/how-etfs-work-creation-redemption-and-arbitrage/) a companion guide in this cluster - [How to Read an ETF Holdings File](https://www.getswoopr.com/etf-investing/how-to-read-an-etf-holdings-file/) a companion guide in this cluster - [International ETFs: Currency Risk and Hedging](https://www.getswoopr.com/etf-investing/international-etfs-currency-risk-and-hedging/) a companion guide in this cluster